JPS5955907A - Apparatus for automatically controlling snowremoving load ofrotary snow removing car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The operating process of a rotary snowplow is quite complex. This includes operating the snow removal equipment (auger blower) and snow throwing chute to match the snow removal conditions, and changing the work speed to adjust the load on the engine. Since this is being carried out on public roads, it is necessary to understand the traffic situation in order to prevent accidents, and the negative impact on traffic is large.

The present invention aims to fully solve these problems, and a practical example thereof will be explained in detail below with reference to the drawings.

First, the power transmission path of the rotary snowplow will be explained. Figure 2 shows the Ka force transmission path. The power goes from the engine 1 to the main clutch 2 to the propulsion shelf 3 to the power distributor ILK, where it is divided into driving power and snow removal power. Running power is generated by power distributor 4 → hydraulic pressure 1. The power is transmitted from the front wheel 8 to the rear wheel 9.

The power for snow removal is mainly transmitted from the power distributor 4 to the propulsion shaft 10 to the transmission 11.The operating method at the time of application is to fix the engine speed at the highest level, then gradually lower the hydraulic pump control lever 1 and turn the hydraulic pressure. The discharge amount of the pump is increased, and the rotational speed of the hydraulic motor is increased accordingly, increasing the vehicle speed. When the vehicle speed increases, the snow removal heavy electric power increases per unit time, the horsepower required for snow removal increases, and the engine output increases. The result is an increase in fuel injection and a decrease in engine speed. The operator knows the load condition of the engine from the change in the engine sound and the drop in the engine speed as indicated by the tachometer. Adjust the iL operation, that is, the hydraulic pump control lever 14, so that the rotation speed at torque (σ) can be maintained at the same level as Takechika. The vehicle speed is similarly adjusted in response to changes in blood removal cross-sectional area and snow density. The present invention automatically adjusts vehicle speed to maintain an optimal engine load during snow removal operations.

Figure 3 shows the automatic control system 1ψ. The engine speed is detected by the rotation detector 15→F/V converter 16, and
The movement of the fuel injection pump control rack of the engine is detected by the displacement detector 17 → dynamic susceptibility meter 18, and is inputted to the control signal calculation circuit 19 as an input signal. In addition, a sensor 24 (for snow removal cross-sectional area measurement) that measures the cross-sectional area of the snow removed section is used to measure the cross-sectional area of the snow removal section, and the measured value is similarly input to the control signal calculation circuit 19.

It is attached to the tip of the provided snow cutter 13B. The input signals are processed by the microcomputer according to the control signal program flowchart shown in FIG. 4, and an output signal is outputted so that the vehicle speed is at the correct speed. The signal output from the control signal calculation circuit is converted into an analog signal by the -D/A converter 20, and then input to the phase advance circuit 21 shown in Fig. 5, which corrects the delay in the control system signal. After.

The signal is transmitted from the servo amplifier 22 to the servo valve 26.

As a result, the discharge amount of the hydraulic pump is varied, and the vehicle speed selected for snow removal work is finally obtained. Above σ) Eliminated by repeating the signal flow.

Efficient work = rability. Especially in the case of the subject matter 1
By using both the engine speed and the amount of fuel injection pump control rack movement as input signals, the load condition of the engine can be sensed more accurately. In addition, the load applied to the sensor (for snow removal cross-sectional area measurement) 21 is predicted to some extent, and the output of the control signal calculation circuit is calculated.

Since the vehicle speed is generally adjusted, unstable phenomena such as hunting are eliminated, resulting in smooth snow removal work. In the figure, S is skin.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention. Figure 5 is a schematic side view of a rotary snowplow, Figure 21 is a power transmission system diagram of a general rotary snowplow, and Figure 3 is a diagram of the power transmission system adopted by the present invention. FIG. 4 is a control signal program flowchart and FIG. 5 is a phase advance circuit diagram. 1110 institutions, 2. ．． ．． Main clutch, 3. ,,propulsion axis. l..., power distribution machine, 5. ,,hydraulic pump,6. ,. Hydraulic motor, 7. , , transmission (for running), 8... front wheels, 9. ,, Rear wheel, 10. ,,propulsion shaft, 11
,,. Transmission engine, 12. ,, Prower, 16... Auger IA, 1mm water pump control leno,
1500, rotation detector, 1/), y/V controller. 17., displacement detector, 18. ,・Dynamic strain meter. 19., control signal calculation circuit, 20. , ,D/A converter, 21. ,,phase advance circuit,22. -, servo amplifier,
26. ,,Servopulp,2a,,,Sensor (for measurement of vertical section selection). Patent issued 111 people Kita, T & Road Development Bureau Construction Machinery Works Director's representative Demolition engineer Kawa Narihata No. 1
Figure 2 Figure 24 Figure 3

Claims (1)

[Claims] The most efficient method is to input electrical signals such as the number of revolutions and the position of the fuel injection pump into a microcomputer to calculate the engine load during one operation, and to manually measure the snow removal cross-sectional area in advance. The oil pump from the microcomputer as if it were removed by snow removal.
1. An automatic snow removal load control device for a rotary snowplow, characterized in that it is configured to send a signal to a pressure valve to control the vehicle running chain during snow removal.